Changed udelay in delay_tsc to be more be more considerate of single

processor environments.


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2009 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/cpu/x86/tsc/delay_tsc.c

@@ -159,7 +159,11 @@ void udelay(unsigned us)
         count = rdtscll();
         stop = clocks + count;
         while(stop > count) {
+#ifdef CONFIG_SMP
+#if CONFIG_SMP == 1
 		cpu_relax();
+#endif
+#endif
 		count = rdtscll();
         }
 }